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작성자바람돌이 조회 2회 작성일 2022-01-27 16:54:50 댓글 0


Nuclear Reactor - Understanding how it works | Physics Elearnin

Nuclear Reactor - Understanding how it works | Physics Elearnin video

Nuclear reactors are the modern day devices extensively used for power generation as the traditional fossil fuels, like coal, are at the breach of extinction. A nuclear reactor is the source of intense heat which is in turn used for generation of power in nuclear power station. Its mechanism is similar to that of a furnace in a steam generator; the steam is used to drive the turbines of the electric generator system.
A nuclear reactor consists of three crucial components: Fuel elements, moderator and control rods.
Fuel elements come usually in the shape of thin rods of about 1cm in diameter and contain fissionable nuclei, like Uranium (235 92U or 238 92U). These rods vary in number according to the size of the reactor, in large power reactor thousands of fuel elements are placed close to each other. This region where these fuel elements are placed is called the reactor core. These fuel elements are normally immersed in water which acts as a moderator.
The objective of a moderator is to slow down the energy neutrons in a nuclear reactor which are produced during the nuclear fission process by the fuel elements. Thermal neutrons, which are neutrons with energy of about 0.04 electron volts, are capable of producing fission reaction with 235 92U. During the fission reaction process, new neutrons are given out which have energies of about 1 MeV. These neutrons of typically escape from participating in another fission process as they are accompanied by enormous energy release. In f -ct, the probability of these neutrons produce another fission reaction is 500 times less than as compared to that of a thermal neutron. This is where moderator is extremely useful. Moderator has the capability to slow down, or in other words moderate, the speed of these high-energy neutrons, so that they can in turn be used for a chain reaction to trigger multiple fission reactions of other 235 92U nucleus.
Commonly, ordinary or heavy water is used as moderator in nuclear reactors because of the deuterons present in them which are capable of slowing the neutron speed. Water molecules in the moderator are useful in slowing down the high-energy neutrons which leave the fuel-element after nuclear fission. These high-energy neutrons collide with water molecules thereby losing out on some energy with every collision and therefore slow down substantially. A new fission reaction can now be triggered using this slow neutron by striking it with the fuel element.
The third and of the most prominent part of a nuclear reactor are the control rods. In order to get a steady output of energy from the nuclear reactor, every single nuclear fission reaction should trigger another fission reaction and ensure the availability of a spare neutron released to trigger the chain reaction. By controlling the number of spare neutrons available at any given time, the rate of the nuclear fission chain reaction can be controlled. This control on the fission reaction can be maintained using the control rods.
The main function of the control rods is to absorb any excess or spare neutron in the moderator in order to prevent any further fission reaction. Usually such control rods are made of Boron or Cadmium. To increase the rate of fission reactions, these rods can be removed from the moderator. A steady output of energy can be thus maintained by inserting or removing the control rods in the nuclear reactor.
Now that we know the components of a nuclear reactor, let us understand the working of a nuclear reactor. It is usually enclosed in a shield made of thick concrete walls. It consists of a reactor core, pump and heat exchanger. The reactor core and pump are in placed in contact with the water, which is usually the heat exchanger used in reactors. Due to the enormous amount of heat released dusing nuclear fission reaction, this surrounding water gets heated up and changes to steam, which is in turn used to turn the turbines. Thus huge heat energy gets converted into electrical energy. Water is continuously flown in and out of the nuclear reactor using the pump.
Thus a nuclear reactor successfully generates nuclear energy from fission reaction.
Alassane Faye : Watches Chernobyl once... Becomes Nuclear Physicist through YouTube
Ice TheKing : I love how we're basically just using high powered energy and nuclear power to heat up water
8o8inSquares : Thanks! Now I can build my own!
TripHazard : Everyone's talking about how they came from Chernobyl, but I came from my Physics homework ...
Kenan Salkovic : Good video and understandable animations, but you missed 3 key elements (especially for a PWR system, like the one in your video). A pressurizer to keep the water in the containment shell circuit liquid. This water would otherwise turn into steam. The next key element is a third circuit to cool the steam from the second circuit. And the last element is the condenser. The place where the steam from the second circuit (high and low pressure turbines) will collect and condense to water, with the help of the third circuit. Other from these 3 points good vid

전기용어, 쉽고 간단하게 알아봐요! [리액터]

안녕하세요, 다산에듀 강사 권동성입니다.

이번 영상은 리액터에 대한 영상입니다.

◈리액터의 사전적 정의◈
: 전력용 변압기 및 배전용 변압기에서 회로에 유도 리액턴스를 도입하는 것을 목적으로 한 전자 장치의 하나. 철심 위에 다수의 권선을 감은 것을 주로 사용한다.

리액터는 코일로 된 인덕터를 뜻하는데,이를 사용하는 이유는 전력계통에서 고조파 전압을 억제할 수 있고, 전압파형이 올바르게 나올 수 있도록 하고 제3고조파, 5고조파를 차단할 수 있습니다. 리액터는 전류가 급변하는 것을 막기 때문에 전류를 필터링 할 수 있습니다. 전압 또한 마찬가지입니다.

오늘도 시청해주셔서 감사합니다.
풍성한 한가위 되세요^__^

#다산에듀 #전기 #리액터
Fykykdykxdyifykfyk Dyjdykxtjxjtdykjxt : 인덕터랑 리액터랑 같은 것 인가요?
리액터가 리액턴스를 유도하는 물질 즉 코일을 감은것으로 알고있는데
인덕터 또한 코일을 감은것을 통칭하는 것으로 알고 있습니다.
그렇기 때문에 유도전동기를 IM , induction motor라고도 부르지요
답변해주시면 감사하겠습니다.
Woojin Seo : 올리실때 말더듬지말고 천천히 해주세요 ㅠㅠ 이해하면서 듣게
[다산에듀] 권동성 : 인덕터는 코일을 감은 것으로, 유도기, 리액터, 코일이 있습니다. 즉 인덕터는 리액터의 상위개념으로 봐주시면 됩니다. 감사합니다.
[다산에듀] 권동성 : 안녕하세요, 말씀해주신 사항을 토대로 추후 영상 제작 시 참고하겠습니다. 좋은 말씀 감사합니다^^*

Introduction to Reactors in the Chemical Industry // Reactor Engineer Class1

Some basic concepts of Reactors in the Chemical Industry

- Batch Reactor
- Continuous Stirred Tank Reactor
- Plug Flow Reactor
- Packed Bed Reactor

See Reactor Engineering Course Playlist:

For more Podcast Episodes:

⚪Apple Podcast


⚫Google Podcast


FREE E-BOOK on Process Simulation:

Jim Henry : Like your videos.
It is a simple ,straight forward treatise on ground floor chemistry reactions.

I design industrial isolating or insulating coatings for my company, and I always thought the best approach to teaching is an instructor that eliminates the pompous arrogance, and egotism out of the teaching/learning experience.
AZAD ASHRAF : Great job...god are helping thousands of students, teachers and engineers all around the world....if you can try to add some simulation program...")
xxx : Extremely helpful. I hated how my reaction engineering class had no introduction to reactors and just dived into all the calculations, making it boring and hard to visualize things. So glad that I watched this video, or I will be so depressed to just try to figure out what and how these reactors work.
Rami Aladdin : thanks a lot, what about the kinetics and rate of reaction?
Borda : Amazing... I can not even say how much I owe you guys...Thanks




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